Definition: In Oracle, the USER_REPDDL view stores a DDL statement for all the replication objects which are owned by the current logged in user.
The structure of the USER_REPDDL view is shown below.

LOG_ID [NUMBER] - ID from USER_REPCATLOG view
SOURCE [VARCHAR2(128)] - Database name which generates the request.
ROLE [VARCHAR2(1)] - Determines, if the database is a master definition site or master site.
MASTER [VARCHAR2(128)] - Database name, processing the request.
LINE [NUMBER(38)] - Record line number in a request
TEXT [VARCHAR2(2000)] - DDL statement
DDL_NUM [NUMBER(38)] - Order of execution of the DDL statements